Keida Brewer (born September 6, 1970), known professionally as Rasco (a bacronym for "Realistic, Ambitious, Serious, Cautious, and Organized"), is an American rapper. Born in Cleveland, Ohio, Rasco b
1. Compute SHA-256 of OTSCanonicalRecord value → must equal OTSHash 2. Open OTSProofURL → extract Bitcoin block number → must equal OTSBitcoinBlock 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Read CopyrightID inside OTSCanonicalRecord → must equal the CopyrightID above 5. GET OTSVerificationAPI → pre-computed 6-check result from server 6. If all match: this entity was registered on CopyrightChains at OTSTimestamp, independently verifiable on Bitcoin Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0fa244e4a48e3500f869b70464a265865990096640e2a9dfbf86a548ba1c6ca. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/9805a3b9-1a39-48f0-b3ba-52c9a5ed417d.json and https://artists.proofprofile.net/proofs/artist/9805a3b9-1a39-48f0-b3ba-52c9a5ed417d.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd816ffed8f12c9611653167b8068c612a58851c5afce143850e4ef532db6752a. Chain 2 (Bitcoin): anchored in block 958558 (2026-07-18T13:44:16Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/US2Y30619637.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb14a062aa25cc23d60085af37b8ff689e9328b6f48b29fb436844fa2cbc55ead. Chain 2 (Bitcoin): anchored in block 957866 (2026-07-13T14:54:25Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/US2Y30619639.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6dda19b53696fa922a63c2d419b21786eb8162077ccde73d8bcb1da1b146117c. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T02:49:15Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/US2Y30619640.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3cc78e4a85c383780b939959c3a06d6d3b0808da5f27fa735f37122753542fda. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/US2Y30619641.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb370620fca41d66280116abc935bf536162ca8dd8ecfcfa12f9479e13e7be4dd. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/US2Y30619642.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe48eeb5e96c8e3ba430adf7e200d3a19863d38f578020e28fae3ffc367eefb1d. Chain 2 (Bitcoin): anchored in block 958631 (2026-07-19T00:50:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/US2Y30619647.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45a500fd99a334b31966411d40d4d58eb2a1ec143c5d2b7c35f895360d9d7494. Chain 2 (Bitcoin): anchored in block 956637 (2026-07-04T10:56:23Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USUYG1006366.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83482dd0b100c0f03c4d2fa59aad54f63e4f14039fd13a99d23ca0705a7acb5e. Chain 2 (Bitcoin): anchored in block 958455 (2026-07-17T21:28:36Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USUYG1022783.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1a498f13bd2e20f12ff959f8eb8a71dc5c22bcaff7740b340f21b0781fc4b0c. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZ5FN2515674.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4215cec534afb0be787a713a9aff2a6a9112b664a246282542286de006c765cb. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBRKQ2597437.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d4aeec256225aeb16280c33d2f3546ebbe2eda6f8e1c4ec73e150306f3017bd. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USGH60610034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8968fd55e72772679b6e93cc0883ad69086211d3120e83b342ebadeb072ff8dd. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USGH60610024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27b736805d09f3861f02cf3779d9ea117655abf3e98f8234c8f909113538399e. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USGH60610029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc525cfbb35dc86ac80176cd11728d6cda999617e6075bdfe15c982bfdab47360. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USGH60610033.
Pieces To The Puzzle (feat. Rasco) [Cuts by Chinch 33]
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d2756b446868cf4df478f77e100ed66d2c1338c106eb1132f664a936f0dd2a2. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FRPI32200144.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3dc340c18c0c6713bf319bac804165ea9c5ee8b9f53714a0d5287ccc64b46e38. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T12:33:25Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZWV32363035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a5f8a10f8c8ced24c3aef561a5bd2139c4c7e6a3232b3db57c4c81a6cc6f403. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QMFMG1503725.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33489b21dd7bd5ea1bbb9304fc7876ae5e08aa1f8b5736b3d7c3445492b8a761. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FR59R2186423.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17013646ef0dac35355ca6eeeda1b9a1fd1349e8c7a834c623095ead3272b6fb. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USGH60810228.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe51aa355f0755be328f73b6f044a4141c2c82e2e1bd99a1dca2535c45b2676c9. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FRPI32300695.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd36c625f24d9e579660ddeb68906a3fd2a00ae367e5c8a4e08d5b73e3c0120d. Chain 2 (Bitcoin): anchored in block 960266 (2026-07-30T14:44:50Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FRPI32300696.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8793604cbf04be991563219e9135b79d10ee40a3f95d51951436ce901f5da0b. Chain 2 (Bitcoin): anchored in block 960240 (2026-07-30T09:57:33Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FRPI32300697.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48916d5cdf0fe5ff786138c8f903fd7bf156a026b19a1e38f6bf65dc8d959d95. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FRPI32300698.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7870743625a43307ea2bf17b12a0c67b7c442f9ec0294e8f39dcc0a1620bc872. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FRPI32300699.